I have a cousin who urgently needs like 20ml of ethanol and 20ml of hexane to run some chemistry chromatography test for a school project. Does anyone know where to purchase these in singapore or does anyone have some to sell?

These chems you looking for are probably controlled items but I googled around hexane can be found on amazon or ebay not sure if they will pass customs.

for ethanol I was going to suggest cook up some rice brew ferment with yeast for a week then try to distill but there's a law which only allows distilling beverages with a license for brewing alcohol for own consumption in sg no license is required.

of course SAF rule number 1 applies too.

Or can try looking around bras basah complex lots of craft shops there lots of students go there too I guess they are getting lab materials from the same places.